Illuminating device for microscopes



April 12, 1932.

E. LIHOTZKY ILLUMINATING DEVICE FOR MICROSCOPES Fi led Sept. 24, 1950 m E g INVENTOR BY ATTORNEY Patented Apr. 1932 UNITED ,STATES' PATENT OFFICE nnwm LIHOTZKY, or wnrz'namennmnv, nssrenon r Enns'r Lmrz', orrrscma:

wnnxn, or WETZLAR, GERMANY, .A' CORPORATION or'ennmm ILLUMINATING DEVICE FOR MICBOSCOPES Application filed September 24, 1930, Serial No. 484,024, and, in Germa'nyjanuary 81, 1929.

as hereinafter described and as illustrated in the accompanying drawingsin which 15 Figure 1 is a central vertical sectional view shown in lowered position. 20 Figure 2 is a similar view showing the obj ective in normal operating raised position.

Referring to the drawings, the reference" "the objectlv'e'may bechanged without the numeral 3 denotes the stage of the microscope which supports a plate 4 on which the speci- 25 men 5 is placed over the opening 6 in the plate. 7 is a condenser frame threaded into the stage 3 for urposes of vertical adjustment. therein. he frame contains a condenser 25 which may be of any suitable type, such as a dioptrical, catadioptrical or catoptrical condenser having one or more effective surfaces for reflecting illuminating rays directed against the underside'of the specimen. The condenser is ring formed and, rovided 35 with an aperture 8 through which t e objective is raised or loweredduring the operation. The usual vertical microscope tube indi-. cated at 9 and carries'a hous 10 containing an indlined' reflector 11' hav ng a: central aperture 12.'.' Through an opening 13 .light from any suitable source not shown admitted to the housing andthe reflector, the

; illuminatin rays being confined within a suitable tu e 14 attached to the housing. The housing carries'the centrally disposed objective 15 of any suitable construction. The upper wall of thehousing is provided with apertures 16-16.

Figure P position. Its raised operating position is through a Le Chatelier microscope, only so 1 much thereof being'shown as is necessary to understand the invention, the objective being -respect to; the specimen independent of the 1 shows the objective in itslowered com'prismg a stage for supporting a. speci f shown in dottecl 'lines at 17. Figure 2 shows an ob ective 18 of a different construction from the objective 15. Otherwise the two figures are alike. a. I

In operation the incoming light rays re resented by the lines 19-19 are reflected y the reflector 11 upwardly through the openings 16 along the lines 2020 which are parallel to the central axis of the microscope and thence. into and through the condenser. in which the rays are condensed and reflected or directed toward the underside of the specimen as indicated by the lines 21-21.

Therays reflecting the picture of the'specimen ass downward through the objective and t 'e opening 12 in the reflector for ob- 'ser'vation' 1n the usual manner.

It will be seen that in the operation of the device the objective may be adjusted with position of the condenser and vice I versa. Also that either or both of the condenser and one efiec'ting the other.

Iclaim: I 1. Illuminating- 'means for microscopes comprising a stage having a central aperture for observmg a specimen placed on the stage,

stage in vertical adjustable relation thereto, an objective mounted below said condenser and adapted to be moved upwards into operative relation withinsaid ringformed cona ring formed condenser mounted below the denser and means movable with the objective for directing illuminating rays upwards around theobjectiveand to the said 'condenser, said light directing means being a ertured to permit a downward illuminate re flection of the specimen. U 2. Illuminating ;means for microscopes comprising a' stagefor sup orting the specien, a condenser and ano 'eotive' mounted in co-axial relation below the stage, means in the objective for directing a hollow circular bundle of rays against the condenser and specimen and mechanism for moving the objective and the said ray directing means with relation to the stage and specimen thereon.

3QIlluminating means for microscopes men to be examined from below, a 'rin formed 1i ht reflecting condenser mounte below said stage, a microscope objective mounted in co-axial relation with said condenser, a reflector carried by said objective for directin illuminating rays upwards around the 0 jective towards the condenser, said reflector having an aperture permitting the downward passage of rays for reflecting the picture of specimen and means for simultaneously moving the objective and the reflector into operative relation with said condenser and away therefrom.

Signed at Frankfort-on-Main, Germany, this'8th day of September, A. D. 1930.

ERWIN LIHOTZKY. 

